Is my Turbo 040 33mhz or 40mhz?

Hi guys. In a recent conquest, I got a Mac II (regular II, no letter afterwords), and a Turbo '040 card. No adapter, so I can't test it. The chip is marked XC68040RC33M, and from what I have read, it's a full 040, running at 33mhz. However, it has a oscillator (silver rectangular object next to CPU), marked 20.000000mhz.

According to this, if it were running at 33mhz, it would have a 16.5mhz oscillator. They say a 20mhz one makes it run at 40mhz.

This page, the entire Applefritter site, and all subsites of are copyright 1999-2999 by Tom Owad unless otherwise noted. All rights reserved. Apple, the Apple logo, Macintosh, Mac, MacOS, MacBook, iMac, and Mac Pro are trademarks of Apple Computer, Inc. LEGO®is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this site (the feeling's mutual).